Communications Support Forums

I have a mid power XTL5000 and am working to interface a VRS750 to it. The radio has an O5 head on it. According to the basic service manual (http://communications.support/threads/149-XTL5000-Detailed-Basic-Service-Manuals) I need to adjust a TIB jumper for pin 12 on the J600 accessory connector. Has anyone performed this and would they be able to assist me in identifying the jumper on the TIB?